Lighting fixture



Sept. 8, 1925 o. DYSON LIGHTING FIXTURE Filed Julv 3, 1924 2 Shoots-Shoot 1 Sept. s, 1925.

o. DYSON LIGHTING FIXTURE Filed July 1924 2 Shoots-Shut 2 A TTQRNEYS.

Patented Sept. 8, 1925.

UNITED STATES OLIVER DYSON, OF BRYN MAWR, PENNSYLVANIA.

LIGHTING FIXTURE.

Application led July 3,

To @ZZ whom t may concern.'

Be it known that I, OLIVER DYSON, a citizen of the United States, residing at Bryn Mawr, in the county of Montgomery and State of Pennsylvania, have invented certain new and useful Improvements in' Lighting` Fixtures; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to malte and use the same, refer-l ence being had to the accompanying drawings, and to characters of reference marked thereon, which form a part of this specification. l

This invention relates, generally, to im pi'ovements in electric light xtures; and, has reference, more particularly, to a novel construction of ceiling fixture or dome light.

The invention has for its principal `ob ject to provide a novel construction of electric light fixture adapted to provide a ceiling or dome light for `general purposes, but which is peculiarly adapted for useV as ya dome or ceiling light for automobiles, buses, etc. The invention is adapted to provide a lighting, fixture, of the kind and'for the purposes above stated, which may be,'if desired, of substantially all glass construction comprising a glass base and reflector element and a detachable glass shade or globe element, all so associated andrelated together that the light is diffused both through the base and shade or globe so as to provide a maximum illuminating; effect with a minimum of shadow or light interference, although in its purely mechanical aspects l do not limit the material of the base to glass.

The 'invention has for a further object to provide a novel mechanical combination and relation of a base and reflector with a glass shade or globe having1 means for de tachably connecting theV latter with the former, to the end that a very attractive and efficient ceiling fixture is provided at a low cost.

Other objects of this invention, not at this time more particularly enumerated, will be clearly understood from the following detailed description of the same.

W'ith the various objects of this invention in view, the same consists, primarily, in the novel electric light fixture hereinafter set forth; and the invention consists, fulilltlq 1924. Serial No. 723,938.

more, in the novel arrangements and combinations of the various devices and parts, as well as in the details of the construction of the salne, all of which will be hereinafter more fully described, and then finally embodied in the claims appended to this specification.

The invent-ion is clearly illustrated in the accompanying drawings, in which Figure l is a bottom view of one form of the novel electric light fixture made according to and embodying the lprinciples of'this invention, and Figure 2 is a vertical transverse section of the same taken on line 2 2 in said Figure l.

Figure 3 is a vertical transverse section of a slightly modified form of my novel electric light fixture; and Figure t is a bottom view of the same with the globe or shade element thereof removed.

Similar characters of reference are employed in all of the hereinabove ydescribed views, to indicate corresponding parts.

'Referring now, more particularly to Figures l and 2 of the accompanying drawings, I have illustrated therein one form of my novel electric light fixture, the same comprising` a base member 5 provided with a central internally threaded openingl 6, and having` the outwardly projecting marginal flange 'i'. Said base member may be molded from glass, which may be either transparent or translucent as desired, or the same may be made of any other material. Said base member is further provided, at the up` per end cf its central internally threaded opening 6 with an annular outwardly offset seat portion 8, which borders the margin of said upper end of the threaded opening 6. The outwardly projecting marginal flange 7 is provided with a plurality of suitably spaced vertical perforations or openings 9 through which may be4 passed fastening` screws l0 for securing` the base member to a ceiling or other wall surface.

The reference character 11 indicates a combined reflectorand lamp-socket supporting member whichis also preferably molded out of glass, although it is not absolutely essential that it be made of such material, for other materials may be employed if desired.` Said reflector and lamp-socket supporting member comprises a depending concavo-convex main body, with its convex side outwardly disposed, said body having at its Upper en@ all QllfWiLrdly extending marginal ent or flange 1 2, which, when the body is assembled with the base member 5, is seated in the seat portion 8 of the latter, so that .the body depends and projects ,cent-rally downwardly through the central threaded opening 6 of the base-member, and 1so `disposed as to be spaced inwardly away from the threaded sides of said opening .6. Integrally connected with the central depending lower end portion of said 'body is an Lip-standing or vertical tubular boss 13, terminating at its upper end in Aan inwardl;VY directed stop-shoulder 14. Said boss 13 provides a central recess 15 to receive a lampsocket. 'The concavo-convex body portion of the combined reflector and lamp-socket supporting member is suitably treated to render the. same light reflecting. When made of glass ift is preferable to provide the inner surface .of said concavo-convex body portion with a coating vof quick-silver 16 to .provide a light reflecting medium. Said light reflecting medium, however, may be produced in any other way found expedidesirable. The lampfsocket employed in the .device preferably comprises a socket-nipple 17 'to the lower end of which is secured a socket-sleeve 18. The socketsleeve 18 ,is entered in the recess 15 of lthe boss 13 until its upper end is stopped against the shoulder lt w-hile the upper free end of the socket-nipple 17 projects upwardly beyond the upper end ,of 4the boss 13. Said upper free end .of the socket-nipple 17 is externally threaded to receive an internally threaded nut or thimble 19, which is screwed down thereon until engaged with the free end of the boss 13, thus interlocking and firmly securing the lamp-socket in desired assembled relation to the combined reflector and lamp-socket supporting member l11. The socket-sleeve 18 is provided with any usual means for engaging and .operatively holding the butt of an electric lamp 20, which is thereby caused to depend from the center of the concavo-convex body of the member 11. yThe current carrying wires 21 are led downwardly through the nut or thimble 19 to the socket-nipple and its ,contacts (not shown) in any usual manner, as will be understood byV those skilled in .the art.

rlhe `reference character 22 indicates a lamp 4enclosing shade lor globe member, which is made of either transparent or translucent glass, as may be desired. This shade .or globe is provided at its upper open end with external screw-threads 23430 screw into said kcentral threaded opening .6 of the basemember .5, to thus operatively .engage the Shade or globe `in assembled and supe ported relation -to the base member. In Onder to reta-in the globe er Vshade against UIlSGI-W-Ilg under vibration, especially when the lighting fixture is 4employed' in auto or other vehicles, I provide a locking means comprising, preferably, a recess 24 in the threaded wall of the opening -6 of said base Ymember .in which is disposed a nut 25. Leading transversely into said recess is an opening 26 through which is passed a set- ,screw V27, the threaded end of which is operatively engaged through said nut 25. By screwing .inwardly .the set-screw 27, the inner end of the same engages the wall of the shade or globe 22, while at the same time backing the nut u25 against the bottom off the recess thus firmly binding the shade or globe 22 against accidental i'novemen-t.

'F rom the vabove description it will readily be understood that I have not only provided a. very simple mechanical construction of ceiling or dome lighting fixture. which may be of substantially all glass construct-'ion iffdesi-red, but one in which a maximum of lighting effect is obtainable for the reason that all of its exposed parts including the base member when made of glass, are of light transmitting character, that the wholel fixture becomesluminous; and, furthermore, there is little or no obstruction to the passage of the light rays for reflection from the ceiling or wall upon which the fix-ture is mounted, nor is `there any tendency to produce shadows on the ceiling or wall surfaces adjacent to the fixture. At the same time a maximum of direct lighting efl'ect is obtained through the l globe or shade by 'both light rays passing directly from .the lamp, as well as from light rays reflected outwardly from the reflector member. F rom the mechanical standpoint, regardless of the materials employed, a compact fixture is provided comprised of but few parts which are both capable of easy assembly, as well as strongly held in assembled relation against accidental separation, while at the same time being free from rattling or noisy vibration. espccially when the fixture is employed in automobiles or other vehicles.

Referring now to Figures 3 and 4, I have illustrated therein a somewhat modified form of my novel lighting fixture, which, although embodying all the advantages above mentioned, is "of a somewhat simpler and cheaper mechanical construction. This modified form of lighting fixture comprises a member 28 having integrally formed therewith a central depending concavo-con Vex 29 with its convex side outwardly disposed. Integra'lly connected with the cen# trail depending lower end portion of said body is an'upstanding or vertical tubular boss 30, terminating at its upper end in an inwardly' directed stop-shoulder 31, and adapted to provide a central recess 32 to support a lamp-socket assembly comprising the socket-.sleeve 18, socketfnipple 17 and nut or thimble 19 in the same manner as already described in correcties with the previously discussed form of my novel lighting fixture. The socket-sleeve 18 supports the electric lamp 20 in the manner above described, and the electric current serving wires 2l are also provided in the usual manner. The base member 28 and its concavo-convex body 29 may be molded from glass, which may be either transparent or translucent according to desire, or it may be made of any other desired material. The concavo-convex body 29 is suitably treated to render the same light reflecting, by providing the same with a coating of quicksilver 33, or by otherwise producing a light reflecting medium. The base-member 28 is provided with a plurality of spaced vertical perforations or openings 34: having enlarged countersunk outer or lower ends to receive fastening screws 35 whereby said base member is secured to the ceiling or other desired wall surface. In addition to the perforations or openings 34C, said base member is provided with a plurality of perforations or openings 36 spaced intermediate said openings 34. The reference character 37 indicates a glass shade or globe memberk which is adapted to fit over the concavo-convex body 29 to enclose the same together with the attached lamp 20. Said globe or shade 37 is provided, at its upper open end, with an outwardly projecting annular flange 38, which is adapted to seat itself upon the base member 28. Said flange 38 is provided with a plurality of holes or perforations 39 which match or align themselves with the additional holes or perforations 36 of the base member so that fastening screws 40 may be passed through the aligned holes or perforations 39 and 36 into the ceiling or other wall, to thus securely fasten the globe or shade in assembled relation with the base member 28 and its associated parts.

It will be understood that the modified structure last described possesses all the advantages of efficient shadowless illumination heretofore pointed out, although, as will be apparent, the mechanical structure is greatly simplified.

I am aware that some changes may be made in the various arrangements and combinations of the several devices and parts, as well as in the details of the construction thereof, without departing from the scope of this invention as above described, and as defined in the appended claims. Hence, I do notlimit my invention to the exact arrangements and combinations of parts as described in the foregoing specification, nor do I conline myself to the exact details of the construction of said parts as illustrated in the accompanying drawings.

I claim 1. A light fixture of the kind described, comprising a base member provided with a central depending concave-convex reflector portion with its convex side outwardly facing, said reflector' portion having a central upstanding tubular boss to provide a lampsocket receiving recess in its lower end, an inwardly directed annular stop shoulder at the upper end of said boss, a lamp socketsleeve entered in said recess with its upper end stopped against said stop-shoulder, an internally threaded socket-nipple connected with the upper end of said socket-sleeve to project above said boss, a nut engaged on said socket-nipple to retain the same and said socket-sleeve in assembled relation to said boss and its recess whereby said socket-- sleeve may support a lamp below said reflectorportion, a glass globe for enclosing said reflector portion and lamp, and means for detachably connecting said globe with said base member.

2. A lighting fixture of the kind described, comprising a base member having an outwardly directed annular flange at its base line, said flange having perforations to permit fastening screws to pass therethrough, said base member having an internally threaded central opening in its main body, a central depending reflector member connected with said base member to depend through said central opening thereof but spaced inwardly from the threaded sides of said opening, means at the lower end of said reflector portion for supporting a lampsocket and its lamp, a glass globe for enclosing said reflectorportion and lamp, and said globe having external screw threads at its open end to screw into said internally threaded opening of said base member.

3. A lighting fixture of the kind described, comprising a base member having an outwardly directed annular flange at its base line, said flange having perforations to permit fastening screws to pass therethrough, said base member having an internally threaded central opening in its main body, a central depending reflector member connected with saidbase member to depend through said central opening thereof but spaced inwardly from the threaded sides of said opening, means at the lower end of said reflector portion for supporting a lampsocket and its lamp, a glass globe for enclosing said reflector portion and lamp, said globe having external screw threads at its open end to screw into said internally threaded opening of said base member, an-d means for locking said globe against accidental detachment from said base member.

Il. A lighting fixture of the kind described, comprising a base member having an outwardly directed annular flange at its base' line, said flange having perforations to permit fastening screws to pass therethrough, said base member having an internally threaded central opening in its main body, a central depending reflector member connected with said base member 'to depend through said central opening thereof but spaced inwardly from the threaded sides of said opening, Ameans at the lower Vend of said reflector portion for supporting a lamp socket and its lamp., a glass globe lfor enclosing said reiiectorportion `and lamp, said globe having external screw threads at its open end to screw into said internally threaded opening of said base member, and means for locking said :globe against accidental detachment from said base member., comprising a recess in the internally serenir threaded Wall of said base member opening, a nut in sai-d recess, and a set .screw .extending .transversely 'through said base member and 4through said nut to engage said globe.

5. A lighting Xture-of the kind described, comprising a` base member having `an outwardly directed annular flange at its base line, said flange havin-g perforations .to permit fastening screws to pass therethrough, said base member having an Ainternally threaded 'central opening .in its main body, a fcen-tral depending reflector member con` nected with said base member -to `depend through said central opening thereof but spaced inwardly from the threaded sides of said opening, said reflector portion having a central upstandi-ng tubular boss to provide a lamp-,socket receiving recess in its lower end, an inwardly directed annular stop shoulder .at the upper end :of said boss, a lamp-socket .device entered in said recess against -said stop-shoulder., means for securing said lamp-socket against displacement from said recess, said lamp-socket being adapted to support a lamp beneath said reflec-tor portion, a glass globe for enclosing said reflector portion and lamp, `and ysaid globe having external screw threads at its open end `to screw into said internally threaded opening of said base member.

6. A lighting fixture .of the kind described, comprising a base member having an outwardly directed annular flange at its base line, said iiange having perforations to permit fastening screws to pass therethrough, said `base member having lan internally threaded central opening in its main body, a central depending reflector member connected with said base member to depen-d through said central opening thereof but spaced inwardly from the threaded sides of said opening, said reflector portion .having a central .upstanding tubular boss to provide a lamp-socket receiving recess in its lower end, an inwardly directed annular stop shoulder at the upper end of said boss, a lamp-socket device entered in said recess against said stop-shoulder, means for securing` said lamp-socket against displacement from said recess, said lamp-socket being adapted to support a lamp beneath said reflector portion, a glass .globe .for enclosing said reflector portion .and lamp, said globek having external screw vthreads at its o pen end :to screw into said internally threaded opening `of said base member, and means for locking said globe against accidental detachment from said base member.

7; A lighting fixture of the .kind described, comprising Va base member having an outwardly directed annular flange at its base line, said flange having perforations to permit fastening screws to pass therethrough, said base member having an internally threaded ycentral opening in its main body, a central depending .reflector member -connected with said base member to depend having external `screw threads at its open.

end to screw into said internally threaded opening of said base member, and mea-ns for locking said globe against accidental detachment from said base member, comprising a recess inthe internally threaded wall of said base member opening, a nut in said recess, and a set screw extending transversely through said base .member and through said nut to engage said globe.

In testimony, that I claim the invention set forth above I have hereunto set my hand this 27th day of June, 1924.

OLIVER DYSOL.

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